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PS1-13cbe: The Rapid 'Turn on' of a Seyfert 1
- Publication Year :
- 2018
- Publisher :
- arXiv, 2018.
-
Abstract
- We present a nuclear transient event, PS1-13cbe, that was first discovered in the Pan-STARRS1 survey in 2013. The outburst occurred in the nucleus of the galaxy SDSS J222153.87+003054.2 at $z = 0.12355$, which was classified as a Seyfert 2 in a pre-outburst archival Sloan Digital Sky Survey (SDSS) spectrum. PS1-13cbe showed the appearance of strong broad H$\alpha$ and H$\beta$ emission lines and a non-stellar continuum in a Magellan spectrum taken 57 days after the peak of the outburst that resembled the characteristics of a Seyfert 1. These broad lines were not present in the SDSS spectrum taken a decade earlier and faded away within two years, as observed in several late-time MDM spectra. We argue that the dramatic appearance and disappearance of the broad lines and factor of $\sim 8$ increase in the optical continuum is most likely caused by variability in the pre-existing accretion disk than a tidal disruption event, supernova, or variable obscuration. The timescale for the turn-on of the optical emission of $\sim 70$ days observed in this transient is among the shortest observed in a "changing look" active galactic nucleus.<br />Comment: 15 pages, 11 figures, 2 tables
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
Astrophysics::High Energy Astrophysical Phenomena
Astrophysics of Galaxies (astro-ph.GA)
Astrophysics::Solar and Stellar Astrophysics
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics - High Energy Astrophysical Phenomena
Astrophysics - Astrophysics of Galaxies
Astrophysics::Galaxy Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....e4327e1b06ee461d295c907ec30e5851
- Full Text :
- https://doi.org/10.48550/arxiv.1811.03694